129189000 has 64 divisors (see below), whose sum is σ = 403079040. Its totient is φ = 34449600.

The previous prime is 129188993. The next prime is 129189007. The reversal of 129189000 is 981921.

It is an interprime number because it is at equal distance from previous prime (129188993) and next prime (129189007).

It is a super-3 number, since 3×129189000³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (129189007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18532 + ... + 24531.

It is an arithmetic number, because the mean of its divisors is an integer number (6298110).

Almost surely, 2^129189000 is an apocalyptic number.

129189000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129189000 is an abundant number, since it is smaller than the sum of its proper divisors (273890040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129189000 is a wasteful number, since it uses less digits than its factorization.

129189000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43087 (or 43073 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 129189000 is about 11366.1339073583. The cubic root of 129189000 is about 505.5240777048.

The spelling of 129189000 in words is "one hundred twenty-nine million, one hundred eighty-nine thousand".